TW201630463A - Method and apparatus for configuring and receiving common control information for mtc ue - Google Patents

Abstract

The present disclosure provides a method and an apparatus for configuring and receiving common control information for an MTC UE. A method for configuring common control information for an MTC UE in a serving base station comprises: configuring a first message of the common control information in a specified frequency location of a system bandwidth, and if frequency location of a second message of the common control information changes, configuring a first indication information element in the first message to indicate the frequency location of the second message, wherein the second message is a next message of the first message.

Description

Method and apparatus for configuring and receiving common control information for an MTC UE

The present invention relates generally to the field of wireless communications, and more particularly to methods and apparatus for configuring and receiving common control information for an MTC UE.

Machine Type Communications (MTC) User Equipment (UE) is a machine-specific UE that has been widely used in smart transportation, remote charging, remote monitoring and other fields. In Rel-12, a work project on low-cost MTC UEs has been completed, the goal of which is to reduce the cost of MTC UEs to make them more competitive with other technologies. Due to the tremendous support for further reducing the cost of such devices, low cost MTC UEs are likely to continue in Rel-13 to further reduce costs.

It is expected that the MTC UE will coexist with the normal UE, and the number of MTC UEs will be very large. For a system bandwidth of 20 MHz, limiting the operation of the MTC UE to only the middle 1.4 MHz region of the 20 MHz system bandwidth will result in system congestion. Therefore, it will be more efficient to extend the operation of these MTC UEs to the entire system bandwidth. Since the system is likely to be The MTC UE is shared with legacy UEs and the PDCCH is transmitted over the entire bandwidth, so the EPDCCH will need to be used to schedule common control messages.

Therefore, for the initial connection, how to determine the 1.4 MHz bandwidth that the narrowband UE needs to receive in the entire system bandwidth (for example, 20 MHz bandwidth) becomes a technical problem to be solved.

There is currently no good solution to this problem.

One proposed solution is to limit all System Information Block (SIB) messages to the intermediate 1.4 MHz band. However, since these messages can also be received by legacy UEs, and the scheduling-based mechanism for receiving SIBs in the current standard is considered better, each SIB message, MSG4 message and random access response (RAR) located at 1.4 MHz in the middle The message has a big impact on capacity. Two cases have been studied in RAN2, namely 30,000 users and 10,000 users. In both cases, congestion is always an important issue to consider. In order to support the MTC load, two physical random access channel (PRACH) opportunities are configured every 10 subframes, and typically the RAR window size is 5 (for high load cases, this can be increased). However, due to the SIB transmission, the supported access load is reduced, so that the window size is less than 5. Note that the above analysis assumes that MSG4 does not share the same RF resources. The intermediate frequency band can also be used to transmit other signaling, such as EPDCCH, which further reduces capacity.

Therefore, the design of this proposal has serious problems.

According to a first aspect of the present invention, a service base station is provided A method for configuring common control information for an MTC UE, comprising: configuring a first message of the common control information at a specified frequency location of a system bandwidth, wherein if a frequency location of the second message of the common control information changes, Configuring a first indicator cell in the first message to indicate a frequency location of the second message, wherein the second message is a next message of the first message.

According to a second aspect of the present invention, a method for receiving public configuration information from a serving base station in an MTC UE includes: receiving a first message of the common control information at a specified frequency location of a system bandwidth; Decoding the first message; if the first message includes a first indication cell for indicating a frequency location of the second message of the common control information, tuning the reception frequency to the frequency of the second message Positioning to receive the second message; if the first message does not include the first indicator cell, still receiving the second message at the specified frequency location.

According to a third aspect of the present invention, an apparatus for configuring common control information for an MTC UE in a serving base station includes: a first message configuration unit configured to configure the common control information at a specified frequency location of a system bandwidth a first message, wherein if the frequency location of the second message of the common control information changes, the first message configuration unit further configures the first indicator cell in the first message to indicate the second message Frequency position, wherein the second message is the next message of the first message.

According to a fourth aspect of the present invention, there is provided a connection in an MTC UE And means for receiving the public configuration information from the service base station, comprising: a receiving unit, configured to receive the first message of the common control information at a specified frequency position of the system bandwidth; and a decoding unit, configured to perform the first message a decoding unit, if the first message includes a first indication cell for indicating a frequency position of the second message of the common control information, tuning a reception frequency to a frequency position of the second message to receive The second message, wherein if the first message does not include the first indicator cell, the receiving unit still receives the second message at the specified frequency location.

400‧‧‧ device

410‧‧‧First Message Configuration Unit

420‧‧‧Second indicator cell configuration unit

430‧‧‧3rd indicator cell configuration unit

440‧‧‧Fourth Indicator Cell Configuration Unit

500‧‧‧ device

510‧‧‧ receiving unit

520‧‧‧Decoding unit

530‧‧‧Tune unit

The invention will be better understood, and the other objects, details, features and advantages of the present invention will become more apparent from the description of the appended claims. In the drawings: FIG. 1 is a flowchart showing a method of configuring common control information for an MTC UE in a serving base station according to an embodiment of the present invention; FIG. 2 is a diagram showing reception from an MTC UE according to an embodiment of the present invention. A flowchart of a method of serving the public configuration information of the base station; FIG. 3 shows a specific example of the frequency position of each message of the common control information for the MTC UE according to the present invention; FIG. 4 shows an embodiment according to the present invention. Schematic diagram of a device for configuring common control information for an MTC UE in a serving base station; and FIG. 5 shows an example for use in an MTC UE according to an embodiment of the present invention A schematic diagram of a device that receives public configuration information from a serving base station.

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiment of the present invention has been shown in the drawings, it is understood that Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Herein, a frequency block used by a bandwidth-limited MTC UE is referred to as an RF block, also referred to as a frequency location.

In the current system, during the initial connection process, the UE will sequentially read the relevant control messages. For example, the UE first decodes the primary synchronization signal (PSS)/auxiliary synchronization signal (SSS), then reads the primary information block (MIB), then the system information block (SIB), and the like.

In view of this sequence, the basic idea of the present invention is that in the initial connection of the MTC UE, in the common control information for the MTC UE, a cell is added to the current message to indicate the frequency position of the next message, that is, occupied. The RF block; if the frequency position of the next message does not change, such an indication cell may not be added. In this way, the MTC UE can determine whether it is necessary to tune to another frequency location to receive the next message by decoding the current message according to whether the current message includes such an indication cell.

1 shows a flow diagram of a method 100 of configuring common control information for an MTC UE in a serving base station in accordance with an embodiment of the present invention.

As shown in FIG. 1, method 100 includes a step 110 in which a serving base station configures a first message of common control information at a specified frequency location of a system bandwidth.

In one implementation, the designated frequency location may be an RF block of 1.4 MHz in the middle of the system bandwidth. Here, for the MTC UE, the first message may be an MIB message, and the serving base station sends the first message to the MTC UE through a physical broadcast channel (PBCH).

The method 100 further includes a step 120, wherein if the frequency position of the second message of the common control information (ie, the next message of the first message) changes, the first indicator cell is configured/added in the first message to indicate the first The frequency position of the two messages.

Here, for the MTC UE, the second message may be an SIB1 message.

Certainly, if the frequency location of the second message does not change, the first indicator cell may be added to the first message to indicate the same RF block as the first message, or the first indicator cell may not be added to the first message.

In one implementation, the method 100 further includes a step 130, wherein if the frequency position of the third message of the common control information (ie, the next message of the second message) changes, the second indication is configured/added in the second message. The cell indicates the frequency position of the third message.

Here, for the MTC UE, the third message may be other SIB messages.

Of course, if the frequency position of the third message does not change, a second indicator cell may be added to the second message to indicate the same RF as the second message. The block may also not add the second indicator cell in the second message.

In one implementation, the method 100 further includes a step 140, wherein if the frequency position of the fourth message of the common control information (ie, the next message of the third message) changes, the third indication is configured/added in the third message. The cell indicates the frequency position of the fourth message.

Here, for the MTC UE, the fourth message may be a RAR message.

Certainly, if the frequency position of the fourth message does not change, the third indicator cell may be added to the third message to indicate the same RF block as the third message, or the third indicator cell may not be added to the third message.

In one implementation, the method 100 further includes a step 150, wherein if the frequency position of the fifth message of the common control information (ie, the next message of the fourth message) changes, the fourth indication is configured/added in the fourth message. The cell indicates the frequency position of the fifth message.

Here, for the MTC UE, the fifth message may be an MSG4 message.

Certainly, if the frequency position of the fifth message does not change, the fourth indicator cell may be added to the fourth message to indicate the same RF block as the fourth message, or the fourth indicator cell may not be added to the fourth message.

2 shows a flow diagram of a method 200 of receiving public configuration information from a serving base station in an MTC UE, in accordance with an embodiment of the present invention.

As shown in FIG. 2, method 200 includes step 202 in which the MTC UE receives the first message of the common control information and decodes the first message at a specified frequency location of the system bandwidth.

In one implementation, the designated frequency location may be an RF block of 1.4 MHz in the middle of the system bandwidth. Here, for the MTC UE, the first message may be an MIB message, and the MTC UE receives the first message from the serving base station through the PBCH.

The method 200 further includes a step 204, wherein the MTC UE determines, according to the decoding result, whether the first message includes a first indication cell for indicating a frequency location of the second message of the common control information.

If the result of step 204 is "YES", then method 200 proceeds to step 206 where the MTC UE tunes its receive frequency to the frequency location of the second message to receive the second message.

If the result of step 204 is no, then method 200 proceeds to step 208 where the MTC UE still receives the second message at the designated frequency location of the first message.

Here, for the MTC UE, the second message may be an SIB1 message.

In an implementation, the method 200 may further include the step 210, wherein the MTC UE determines, after receiving the second message, whether the second message includes a second indication cell for indicating a frequency location of the third message of the common control information.

If the result of step 210 is "YES", then method 200 proceeds to step 212 where the MTC UE tunes its receive frequency to the frequency location of the third message to receive the third message.

If the result of step 210 is "NO", the method 200 proceeds to step 214, and the MTC UE still receives the third message at the frequency position of the second message. interest.

Here, for the MTC UE, the third message may be other SIB messages.

In one implementation, the method 200 may further include the step 216, wherein the MTC UE determines, after receiving the third message, whether the third message includes a third indication cell for indicating a frequency location of the fourth message of the common control information.

If the result of step 216 is "YES", then method 200 proceeds to step 218 where the MTC UE tunes its receive frequency to the frequency location of the fourth message to receive the fourth message.

If the result of step 216 is "NO", then method 200 proceeds to step 220 where the MTC UE still receives the fourth message at the frequency location of the third message.

Here, for the MTC UE, the fourth message may be a RAR message.

In one implementation, the method 200 may further include the step 222, wherein the MTC UE determines, after receiving the fourth message, whether the fourth message includes a fourth indication cell for indicating a frequency location of the fifth message of the common control information.

If the result of step 222 is "YES", then method 200 proceeds to step 224 where the MTC UE tunes its receive frequency to the frequency location of the fifth message to receive the fifth message.

If the result of step 222 is "NO", the method 200 proceeds to step 226, and the MTC UE still receives the fifth message at the frequency position of the fourth message. interest.

Here, for the MTC UE, the fifth message may be an MSG4 message.

In methods 100 and 200, the current message contains the indication of the frequency location of the next message (eg, the determination of steps 204, 210, 216, 222 is "YES") does not require EPDCCH for the next message. Case. That is, scheduling information such as MCS and PRB locations within the RF block are known in advance, or can be blindly decoded from a group of candidates.

In the existing scheme, one RAR message can carry three responses, but 6 PRBs (about 370-bit capacity) can only carry one MSG4, so this requires a load distribution mechanism for MSG4.

With the above methods 100 and 200, the common control information for the MTC UE with limited bandwidth can be extended to the entire system bandwidth (for example, the bandwidth of 20 MHz) by assigning the frequency position of the different RF blocks to the MSG4 message of each MTC UE. Not limited to the middle 1.4MHz bandwidth.

In one implementation, a Radio Resource Control (RRC) idle mode MTC UE detects an RF block (frequency location) configured by a serving base station to obtain a paging message, which may be determined by a function. In another implementation, the MTC UE monitors the paging message directly in the configured RF block. To save power, a separate, longer paging opportunity can be used. The RF block can be configured by the base station or can be defined in the standard, for example in the middle 1.4 MHz band.

For the MTC UE in the RRC connected mode, the paging message is adjusted. Degrees and transmissions are similar to UE-specific messages.

FIG. 3 shows a specific example of the frequency position of each message of the common control information for the MTC UE according to the present invention. In this example, the RF block is represented as 1.4 MHz wide.

According to the current system, PSS/SSS and PBCH are located at 1.4 MHz in the middle of the system bandwidth, and the UE will decode the PBCH to read the MIB in the middle 1.4 MHz block of the system bandwidth. That is, in this example, the initial RF block for the MIB is in the middle of the system bandwidth. However, those skilled in the art will appreciate that the present invention is not limited thereto, and the first message may be located at any frequency location in the system bandwidth, may be specified by the standard or specified by the service base station.

In the example shown in Figure 3, the MIB message does not contain information about the location of the RF block for the next message (i.e., the SIB1 message). Therefore the MTC UE will find the EPDCCH containing the scheduling information for SIB1 in the same RF block.

According to this example, the SIB1 message contains the frequency location of the RF block of the next message (ie, other SIB messages). The MTC UE moves its reception frequency to the indicated RF block to read the corresponding SIB message.

After transmitting the PRACH (preamble), the MTC UE predicts that the RAR message will arrive in the same RF block according to the third message (other SIB messages), so it attempts to decode the RAR message in the RF block.

In this example, the RAR message contains the frequency location of the RF block of the next message (MSG4). Therefore, after transmitting the MSG3 message, the MTC UE tunes the reception frequency to the indicated frequency position to wait for the MSG4 message.

It can be seen that in the solution provided by the present invention, some information is needed. Adding some cells, the message includes: an RRC message to which a cell for indicating a new RF block (frequency location) is added; and an RAR message to which an RF block (frequency location) for indicating the MSG4 is added Cell.

The proposed scheme gives a way to extend the common control information of the MTC UE to the entire system bandwidth, so that the network can use other parts of the spectrum instead of concentrating all the information in the middle 1.4 MHz bandwidth (6 PRB).

In the above, the method performed by the present invention on the serving base station side and the MTC UE side according to the content of the common control information for the MTC UE in the current system is described. However, those skilled in the art will appreciate that the present invention is not limited thereto. Under the inventive concept of the present invention, the above solution can be applied to any architecture for public control information for MTC UEs currently and in the future. For example, if the public control information for the MTC UE developed in the future includes other information than MIB, SIB, RAR, MSG4, or the common control information may include some information in the MIB, SIB, RAR, MSG4 or any of them. combination.

4 shows a schematic diagram of an apparatus 400 for configuring common control information for an MTC UE in a serving base station in accordance with an embodiment of the present invention.

As shown in FIG. 4, the apparatus 400 includes a first message configuration unit 410 for configuring a first message of common control information at a specified frequency location of the system bandwidth, wherein if the frequency location of the second message of the common control information occurs If the change is made, the first message configuration unit 410 is still in the first message. The first indicator cell is configured to indicate the frequency location of the second message, wherein the second message is the next message of the first message.

In one implementation, the apparatus 400 further includes a second indication cell configuration unit 420, if the frequency location of the third message of the common control information changes, the second indication cell configuration unit 420 configures the second indication in the second message. The cell indicates the frequency position of the third message, wherein the third message is the next message of the second message.

In one implementation, the apparatus 400 further includes a third indication cell configuration unit 430, if the frequency location of the fourth message of the common control information changes, the third indication cell configuration unit 430 configures the third indication in the third message. The cell indicates the frequency position of the fourth message, wherein the fourth message is the next message of the third message.

In one implementation, the apparatus 400 further includes a fourth indication cell configuration unit 440, and if the frequency location of the fifth message of the common control information changes, the fourth indication cell configuration unit 440 configures the fourth indication in the fourth message. The cell indicates the frequency position of the fifth message, wherein the fifth message is the next message of the fourth message.

In one implementation, the first message, the second message, the third message, the fourth message, and the fifth message are MIB messages, SIB1 messages, other SIB messages, RAR messages, and MSG4 messages, respectively.

FIG. 5 shows a schematic diagram of an apparatus 500 for receiving public configuration information from a serving base station in an MTC UE, in accordance with an embodiment of the present invention.

As shown in FIG. 5, the apparatus 500 includes: a receiving unit 510, configured to Receiving a first message of the common control information at a specified frequency position of the system bandwidth; decoding unit 520 for decoding the first message; and tuning unit 530, if the first message includes a second for indicating common control information The first indicator cell of the frequency position of the message, the frequency of the reception is tuned to the frequency position of the second message to receive the second message; wherein if the first message does not include the first indicator cell, the receiving unit 510 is still specifying The second message is received at the frequency location.

In one implementation, decoding unit 520 also decodes the second message; and if the second message includes a second indicator cell for indicating the frequency location of the third message of the common control information, tuning unit 530 tunes the receiving frequency The frequency position to the third message is to receive the third message, and if the second message does not include the second indicator cell, the receiving unit 510 still receives the third message at the frequency position of the second message.

In one implementation, decoding unit 520 also decodes the third message; if the third message includes a third indicator cell indicating the frequency location of the fourth message of the common control information, tuning unit 530 tunes the receive frequency to The frequency position of the fourth message is to receive the fourth message; and if the third message does not include the third indicator cell, the receiving unit 510 still receives the fourth message at the frequency position of the third message.

In one implementation, decoding unit 520 also decodes the fourth message; if the fourth message includes a fourth indication cell for indicating the frequency location of the fifth message of the common control information, tuning unit 530 tunes the reception frequency to a frequency position of the fifth message to receive the fifth message; and if the fourth message does not include the fourth indicator cell, the receiving unit 510 is still in the fourth message The fifth message is received at the frequency position of the message.

In one implementation, the first message, the second message, the third message, the fourth message, and the fifth message are MIB messages, SIB1 messages, other SIB messages, RAR messages, and MSG4 messages, respectively.

The methods disclosed herein are described herein with reference to the drawings. It should be understood, however, that the order of the steps shown in the drawings and in the specification are only illustrative, and that the method steps and/or actions can be performed in a different order without departing from the scope of the claims. The specific order shown in the drawings and described in the specification is not limited.

In one or more exemplary designs, the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored as one or more instructions or code on a computer readable medium or transmitted as one or more instructions or code on a computer readable medium. Computer-readable media includes computer storage media and communication media, including communication media including any media that facilitates the transfer of a computer program from one place to another. The storage medium can be any available media that is accessible to a general purpose or special purpose computer. Such computer readable media may include, for example, without limitation, RAM, ROM, EEPROM, CD-ROM or other optical disk storage device, disk storage device or other magnetic storage device, or may be used in a general purpose or special purpose computer or general purpose or Any other medium in the form of an instruction or data structure accessible by a dedicated processor to carry or store any desired program code module. Also, any connection can be termed a computer readable medium. For example, if the software is using coaxial cable, light Fiber optic cable, twisted pair cable, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave to transmit from a website, server or other remote source, then coaxial cable, fiber optic cable, twisted pair, DSL Or wireless technologies such as infrared, radio and microwave are also included in the definition of the media.

A general purpose processor, digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or Various combinations of the logic blocks, modules, and circuits described in connection with the present disclosure are implemented or performed in any combination of the functions described herein. A general purpose processor may be a microprocessor, or the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other such structure.

Those of ordinary skill in the art will also appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments of the present application can be implemented as an electronic hardware, a computer software, or a combination of both. To clearly illustrate this interchangeability between hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described in terms of their functionality. Whether this function is implemented as a hardware or as a software depends on the particular application and design constraints imposed on the overall system. Those skilled in the art can implement the described functions in a modified manner for each specific application, but such implementation decisions should not be construed as It is within the scope of protection of the present invention.

The above description of the disclosure is provided to enable any person skilled in the art to make or use the invention. Various modifications of the present disclosure are obvious to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit and scope of the invention. Thus, the present invention is not intended to be limited to the details and the details of

Claims (12)

A method for configuring common control information for an MTC UE in a serving base station, comprising: configuring a first message of the common control information at a specified frequency position of a system bandwidth, wherein if a frequency position of the second message of the common control information occurs And changing, the first indication cell is configured in the first message to indicate a frequency location of the second message, wherein the second message is a next message of the first message. The method of claim 1, further comprising: if the frequency position of the third message of the common control information changes, configuring a second indication cell in the second message to indicate the third message The frequency location, wherein the third message is the next message of the second message. The method of claim 2, further comprising: if the frequency position of the fourth message of the common control information changes, configuring a third indicator cell in the third message to indicate the fourth message The frequency location, wherein the fourth message is the next message of the third message. The method of claim 3, further comprising: if the frequency position of the fifth message of the common control information changes, configuring a fourth indication cell in the fourth message to indicate the fifth message The frequency position, wherein the fifth message is the next message of the fourth message. The method of claim 4, wherein the first message, the second message, the third message, the fourth message, and the fifth message are MIB messages, SIB1 messages, other SIB messages, RAR messages, and MSG4 messages, respectively. . A method for receiving public configuration information from a serving base station in an MTC UE, comprising: receiving a first message of the common control information at a specified frequency location of a system bandwidth; decoding the first message; if the first message a first indication cell including a frequency location of the second message for indicating the common control information, the frequency of the reception is tuned to a frequency location of the second message to receive the second message; if the first message does not include the The first indicator cell still receives the second message at the specified frequency location. The method of claim 6, further comprising: decoding the second message; if the second message includes a second indication cell for indicating a frequency location of the third message of the common control information, And the receiving frequency is tuned to the frequency position of the third message to receive the third message; if the second message does not include the second indicator cell, the third message is still received at the frequency position of the second message . The method of claim 7, further comprising: decoding the third message; if the third message includes a fourth for indicating the common control information The third indicator cell of the frequency position of the message, the receiving frequency is tuned to the frequency position of the fourth message to receive the fourth message; if the third message does not include the third indicator cell, the The fourth message is received at the frequency position of the three messages. The method of claim 8, further comprising: decoding the fourth message; if the fourth message includes a fourth indication cell for indicating a frequency position of the fifth message of the common control information, And the receiving frequency is tuned to the frequency position of the fifth message to receive the fifth message; if the fourth message does not include the fourth indicator cell, the fifth message is still received at the frequency position of the fourth message. . The method of claim 9, wherein the first message, the second message, the third message, the fourth message, and the fifth message are MIB messages, SIB1 messages, other SIB messages, RAR messages, and MSG4 messages, respectively. . An apparatus for configuring common control information for an MTC UE in a serving base station, comprising: a first message configuration unit, configured to configure a first message of the common control information at a specified frequency position of a system bandwidth, wherein if the public control information The first message configuration unit further configures the first indication cell to indicate the frequency location of the second message, where the second message is the first message. Next message. A public distribution from a service base station in an MTC UE The device for setting information includes: a receiving unit, configured to receive a first message of the common control information at a specified frequency position of the system bandwidth; a decoding unit configured to decode the first message; and a tuning unit if the first The message includes a first indicator cell for indicating a frequency location of the second message of the common control information, and the receiving frequency is tuned to a frequency location of the second message to receive the second message, wherein if the first message If the first indicator cell is not included, the receiving unit still receives the second message at the specified frequency position.